The ____ secretes melatonin, a hormone that promotes sleep in human beings
a. pineal gland
b. suprachiasmatic nucleus
c. crepuscular gland
d. biological clock
e. hypothalamus
a
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Explain the relationship between chickenpox and shingles, paying special attention to the pathogenic processes and transmission of each of these diseases
What will be an ideal response?
Which brain region is associated with language in humans?
A. occipital lobe B. parietal lobe C. frontal lobe D. temporal lobe
Hans Spemann and Hilde Mangold conducted pioneering experiments in which they transplanted the dorsal lip of the blastopore in an early gastrula newt to the ventral side of another early gastrula newt. What was the outcome of this experiment?
A. Discovery of Spemann's organizer. B. The development of dorsal structures (neural tube, notochord) on both the dorsal and ventral parts of the gastrula that received the transplant. C. Identification of a morphogenic field in the dorsal lip of the blastopore of an early gastrula. D. Discovery of a group of embryonic cells in the dorsal lip that ultimately produce specific body structures. E. All of the choices are correct.
Vascular plant bodies typically consist of a(n) ____ shoot system and a ____ root system
a. photosynthetic; photosynthetic b. nonphotosynthetic; photosynthetic c. photosynthetic; nonphotosynthetic d. nonphotosynthetic; nonphotosynthetic e. heterotrophic; phototrophic